A farmer had been using a particular insecticide for a long time. What consequences will it have on Insect population?&l…

Streptomycin and actinomycin were discovered by</h2></div>

Most active nitrogen fixing blue-green algae of rice fields is</h2></div>

In the treatment of waste water discharge, which treatment stage involves biological treatment?</h2></…

Biogas production is</h2></div>

Which of the following gas is produced using dung of cattle?

<p><i>Azolla</i> is used as biofertilizer as it has</p> </h2></div>

Which of the following statements is incorrect ?</h2></div>